| 摘要 |
This cast-molded heat-curable polyurethane elastomer is obtained by reacting at least a polycarbonate polyol (A), a polyisocyanate (B), and a polyrotaxane (C) and can, if necessary, include 0%-30% by mass of an inorganic material (D), relative to the total mass of polycarbonate polyol (A), polyisocyanate (B), polyrotaxane (C), and the inorganic material (D). The mass addition ratio of the polyrotaxane (C) is 1%-10% by mass relative to the total mass of polycarbonate polyol (A), polyisocyanate (B), polyrotaxane (C), and the inorganic material (D); the viscosity of the polyrotaxane (C) is no more than 5,000 cP at 120°C; or the dilutable rate for the polyisocyanate (B) is no more than 0.4. |
